Pokemon's First Appearance: Pokemon Red, Blue & Yellow

What's common among most Normal-type Pokemon (as you'll see on the rest of this list) is that they're all nearly invincible. This is almost the case with Porygon. It has great power, speed and stamina, and can learn an assortment of non-damaging and damaging moves. Porygon's only real cons are its low base stat total (395), and it's being weak against Fighting attacks. (And the fact that it looks like pieces of pink and blue rock candy.)